AM-EWOD array element circuitry with shared sensor components
US10814324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2018 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Jan 18, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An AM-EWOD device includes a plurality of array elements arranged in an array of rows and columns, each of the array elements including array element circuitry, an element electrode, and a reference electrode. The array element circuitry includes actuation circuitry that applies actuation voltages to the element and reference electrodes, and impedance sensor circuitry that senses impedance at the array element electrode to determine a droplet property at the array element. At least one component of the impedance sensor circuitry is a shared component that is shared between more than one of the array elements. The shared component may include a shared sensor readout transistor that passes a sensor current to a sensor output line, or a shared reset transistor that applies a reset voltage to a gate of the shared sensor readout transistor, with such components being shared by array elements in adjacent rows. The shared component may include a shared sensor output column line that is shared between array elements in adjacent columns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.